jupyterhub 3.0.0+ds1-1 (armhf binary) in ubuntu lunar

 With JupyterHub you can create a multi-user Hub which spawns,
 manages, and proxies multiple instances of the single-user Jupyter
 notebook server.
 .
 Project Jupyter created JupyterHub to support many users. The Hub can
 offer notebook servers to a class of students, a corporate data
 science workgroup, a scientific research project, or a high
 performance computing group.